Hi guys!
I think I have located the sensor, it has been detected as wrong type. I'll look into that next week.
I also noticed that the documentation is off. It should be im_buildings with and underscore. I'll fix that too. So you are both right, normally the sensor should be identified automatically and "just work" like @Christoffer writes . But in this case it did not.
The correct fix is to do what @tobiasjonsson did and set it manually to the correct value. In this case, however, embarrassingly, the documentation was incorrect.
